fix infinite loop (closes #3)

conf.ifconfig

@@ -24,7 +24,7 @@ regexp=(inet6?|netmask|broadcast)
 colours=cyan
 =======
 #flags
-regexp=(?<=[,<])[^,]*(?=[,>])
+regexp=(?<=[,<])[^,]+?(?=[,>])
 colours=blue
 =======
 # mtu

debian/changelog

@@ -2,6 +2,7 @@ grc (1.8-1) unstable; urgency=low
 
   * added support for Ki, Gi, Ti for df (thanks to Juraj Bednár)
   * added example aliases for bash  (thanks to Juraj Bednár)
+  * fix infinite loop if regexp matches but does not consume anything
 
  --  Radovan Garabík <garabik@kassiopeia.juls.savba.sk>  Mon, 16 Mar 2015 14:38:42 +0100
 

grcat

@@ -185,7 +185,13 @@ while 1:
                         break
                     if currcount == "more":
                         prevcount = "more"
-                        pos = m.end(0)
+                        newpos = m.end(0)
+                        # special case, if the regexp matched but did not consume anything,
+                        # advance the position by 1 to escape endless loop
+                        if newpos == pos:
+                            pos += 1
+                        else:
+                            pos = newpos
                     else:
                         prevcount = "once"
                         pos = len(line)